Blass2 Theme-Cannot log in

I’m just setting up a new blog, and chose Blass2 as a theme, because of its great simplicity. However, once the theme was installed, the only way to administer was to use the back button, and having logged off, there seems to be no way to access the admin page. I’m getting this message when I try to log in:
“Not Found
The requested URL /wp-login.php was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.”
I get the same message when clicking on Register, or Lost Password? The file in question (wp-login.php) is in the WordPress folder.

Here’s the url: https://zofilohr.com/wordpress